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Treatment of potato tuber tissues with β-1,3-glucooligosaccharide induces accumulation of (S)-N-p-coumaroyloctopamine (p-CO). We examined the role of reactive oxygen species (ROS) and nitric oxide (NO) in the signal transduction leading to p-CO accumulation. Induction was suppressed by an NADPH -oxidase inhibitor, diphenyleneiodonium chloride, and oxygen radical scavengers. H 2 O 2  was generated in the tuber tissue within a few minutes of treatment with β-1,3-glucooligosaccharide. On the other hand, treatment with NO specific scavenger, nitric oxide synthase inhibitor, and serine protease inhibitor did not inhibit p -CO induction. Our findings suggest that ROS generated by the action o f NADPH -oxidase play an important role in this system, while NO and serine protease are unlikely to be involved in this process.

zeitschrift für naturforschung c

Involvement of Reactive Oxygen Species in the Induction of (S)-N-p-Coumaroyloctopamine Accumulation by β-1,3-Glucooligosaccharide Elicitors in Potato Tuber Tissues